Compilare: main.cpp: In function 'int main()': main.cpp:26:22: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 26 | for(int i=i_s+1;i<strlen(s);i++){ | ~^~~~~~~~~~ main.cpp:27:24: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(int j=i+2;j<strlen(s);j++){ | ~^~~~~~~~~~ main.cpp:10:9: warning: unused variable 'i' [-Wunused-variable] 10 | int i=0,k,i_s; | ^ main.cpp:10:15: warning: 'i_s' may be used uninitialized in this function [-Wmaybe-uninitialized] 10 | int i=0,k,i_s; | ^~~